first commit

Author: GrumpyOldPizza

COMPATIBILITY

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+Ringbuffer.h
+
+	SERIAL_BUFFER_SIZE is 256 instead of 64 to account for the CDCSerial class requirements
+
+
+hooks.h
+hooks.c
+
+	sysTickHook(), svcHook() and pendSVHook() are not implemented as they are part of libstm32l4_dragonfly.a
+
+
+Uart.h
+
+	availableForWrite() has been added as UART output is buffered
+	write(buffer, size) has been added as UART output is buffered (more efficient to write a numbers if bytes)
+
+
+CDC.h
+
+	based upon HardwareSerial
+
+
+Reset.h
+
+	tickReset() not available; code aequivalent implemented in libstm32l4_dragonfly.a
+
+
+wiring_analog.h
+
+	analogReference() not available do to hardware
+
+wiring_digital.c
+
+	digitalWrite() is documented pre 1.0.1 to set the pullup on a INPUT pin; this is not supported.
+
+WInterrupts.c
+	
+	LOW & HIGH are ignored ... pointless ...
+

README.md

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+# arduino-STM32L4

boards.txt

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+# See: http://code.google.com/p/arduino/wiki/Platforms
+
+##############################################################
+
+# Tlera Dragonfly
+# ---------------------------------------
+dragonfly.name=Dragonfly
+dragonfly.vid.0=0x1209
+dragonfly.pid.0=0x6667
+
+dragonfly.upload.tool=stm32l4_upload
+dragonfly.upload.protocol=dfu
+dragonfly.upload.maximum_size=524288
+dragonfly.upload.use_1200bps_touch=true
+dragonfly.upload.wait_for_upload_port=false
+dragonfly.upload.native_usb=false
+
+dragonfly.bootloader.tool=stm32l4_upload
+dragonfly.bootloader.protocol=dfu
+dragonfly.bootloader.file=dragonfly.bin
+
+dragonfly.build.mcu=cortex-m4
+dragonfly.build.f_cpu=80000000L
+dragonfly.build.board=STM32L4_DRAGONFLY
+dragonfly.build.arch=STM32L4
+dragonfly.build.core=stm32l4
+dragonfly.build.extra_flags=-DSTM32L476xx  -D__FPU_PRESENT=1 -march=armv7e-m -mthumb -mfloat-abi=hard -mfpu=fpv4-sp-d16 -mabi=aapcs -mslow-flash-data
+dragonfly.build.ldscript=linker_scripts/flash.ld
+dragonfly.build.variant=dragonfly
+dragonfly.build.variant_system_lib=stm32l4_dragonfly
+dragonfly.build.variant_system_include="-I{runtime.platform.path}/system/libstm32l4_dragonfly/CMSIS/Include" "-I{runtime.platform.path}/system/libstm32l4_dragonfly/CMSIS/Device/ST/STM32L4xx/Include" "-I{runtime.platform.path}/system/libstm32l4_dragonfly/USB/HAL/Inc" "-I{runtime.platform.path}/system/libstm32l4_dragonfly/USB/Core/Inc" "-I{runtime.platform.path}/system/libstm32l4_dragonfly/USB/Class/CDC/Inc" "-I{runtime.platform.path}/system/libstm32l4_dragonfly/USB/Class/MSC/Inc" "-I{runtime.platform.path}/system/libstm32l4_dragonfly/USB" "-I{runtime.platform.path}/system/libstm32l4_dragonfly" 
+dragonfly.build.vid=0x1209
+dragonfly.build.pid=0x6667

bootloaders/dragonfly.bin

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+/*
+  Copyright (c) 2014 Arduino.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+  See the GNU Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef _WIRING_DIGITAL_
+#define _WIRING_DIGITAL_
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+#include "WVariant.h"
+
+
+ *
+ * \param ulPin The number of the pin whose mode you wish to set
+ * \param ulMode Can be INPUT, OUTPUT, INPUT_PULLUP or INPUT_PULLDOWN
+ */
+extern void pinMode( uint32_t dwPin, uint32_t dwMode ) ;
+
+/**
+ * \brief Write a HIGH or a LOW value to a digital pin.
+ *
+ * If the pin has been configured as an OUTPUT with pinMode(), its voltage will be set to the
+ * corresponding value: 5V (or 3.3V on 3.3V boards) for HIGH, 0V (ground) for LOW.
+ *
+ * If the pin is configured as an INPUT, writing a HIGH value with digitalWrite() will enable an internal
+ * 20K pullup resistor (see the tutorial on digital pins). Writing LOW will disable the pullup. The pullup
+ * resistor is enough to light an LED dimly, so if LEDs appear to work, but very dimly, this is a likely
+ * cause. The remedy is to set the pin to an output with the pinMode() function.
+ *
+ * \note Digital pin PIN_LED is harder to use as a digital input than the other digital pins because it has an LED
+ * and resistor attached to it that's soldered to the board on most boards. If you enable its internal 20k pull-up
+ * resistor, it will hang at around 1.7 V instead of the expected 5V because the onboard LED and series resistor
+ * pull the voltage level down, meaning it always returns LOW. If you must use pin PIN_LED as a digital input, use an
+ * external pull down resistor.
+ *
+ * \param dwPin the pin number
+ * \param dwVal HIGH or LOW
+ */
+extern void digitalWrite( uint32_t dwPin, uint32_t dwVal ) ;
+
+/**
+ * \brief Reads the value from a specified digital pin, either HIGH or LOW.
+ *
+ * \param ulPin The number of the digital pin you want to read (int)
+ *
+ * \return HIGH or LOW
+ */
+extern int digitalRead( uint32_t ulPin ) ;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _WIRING_DIGITAL_ */

cores/stm32l4/#wiring_digital.h#

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+/*
+  Arduino.h - Main include file for the Arduino SDK
+  Copyright (c) 2014 Arduino LLC.  All right reserved.
+
+  This library is free software; you can redistribute it and/or
+  modify it under the terms of the GNU Lesser General Public
+  License as published by the Free Software Foundation; either
+  version 2.1 of the License, or (at your option) any later version.
+
+  This library is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with this library; if not, write to the Free Software
+  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#ifndef Arduino_h
+#define Arduino_h
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <math.h>
+
+typedef bool boolean;
+typedef uint8_t byte;
+typedef uint16_t word;
+
+// some libraries and sketches depend on this AVR stuff,
+// assuming Arduino.h or WProgram.h automatically includes it...
+//
+#include "avr/pgmspace.h"
+#include "avr/interrupt.h"
+
+#include "binary.h"
+#include "itoa.h"
+
+#ifdef __cplusplus
+extern "C"{
+#endif // __cplusplus
+
+// Include ST headers
+#include "stm32l4xx.h"
+#undef DAC1
+#undef SPI1
+#undef SPI2
+
+#include "wiring_constants.h"
+
+#define clockCyclesPerMicrosecond() ( SystemCoreClock / 1000000L )
+#define clockCyclesToMicroseconds(a) ( ((a) * 1000L) / (SystemCoreClock / 1000L) )
+#define microsecondsToClockCycles(a) ( (a) * (SystemCoreClock / 1000000L) )
+
+void yield( void ) ;
+
+/* sketch */
+void setup( void ) ;
+void loop( void ) ;
+
+#include "WVariant.h"
+
+#ifdef __cplusplus
+} // extern "C"
+#endif
+
+// The following headers are for C++ only compilation
+#ifdef __cplusplus
+  #include "WCharacter.h"
+  #include "WString.h"
+  #include "Tone.h"
+  #include "WMath.h"
+  #include "HardwareSerial.h"
+#endif
+#ifdef __cplusplus
+  #include "CDC.h"
+  #include "Uart.h"
+#endif
+
+// Include board variant
+#include "variant.h"
+
+#include "wiring.h"
+#include "wiring_analog.h"
+#include "wiring_digital.h"
+#include "wiring_pulse.h"
+#include "wiring_shift.h"
+#include "WInterrupts.h"
+
+// undefine stdlib's abs if encountered
+#ifdef abs
+#undef abs
+#endif // abs
+
+#define min(a,b) ((a)<(b)?(a):(b))
+#define max(a,b) ((a)>(b)?(a):(b))
+#define abs(x) ((x)>0?(x):-(x))
+#define constrain(amt,low,high) ((amt)<(low)?(low):((amt)>(high)?(high):(amt)))
+#define round(x)     ((x)>=0?(long)((x)+0.5):(long)((x)-0.5))
+#define radians(deg) ((deg)*DEG_TO_RAD)
+#define degrees(rad) ((rad)*RAD_TO_DEG)
+#define sq(x) ((x)*(x))
+
+#define interrupts() __enable_irq()
+#define noInterrupts() __disable_irq()
+
+#define lowByte(w) ((uint8_t) ((w) & 0xff))
+#define highByte(w) ((uint8_t) ((w) >> 8))
+
+#define bitRead(value, bit) (((value) >> (bit)) & 0x01)
+#define bitSet(value, bit) ((value) |= (1UL << (bit)))
+#define bitClear(value, bit) ((value) &= ~(1UL << (bit)))
+#define bitWrite(value, bit, bitvalue) (bitvalue ? bitSet(value, bit) : bitClear(value, bit))
+
+#define bit(b) (1UL << (b))
+
+#if (ARDUINO_SAMD_VARIANT_COMPLIANCE >= 10606)
+// Interrupts
+#define digitalPinToInterrupt(P)   ( P )
+#endif
+
+#endif // Arduino_h